M #-: Fix fallback detection in onesysprep of RHEL/C6

Author: vholer

src/usr/sbin/onesysprep

@@ -495,9 +495,9 @@ syscheck()
 
     # check for legacy RHEL/CentOS 6
     elif [ -f /etc/centos-release ]; then
-        echo 'centos'
+        _ONE_OS_ID='centos'
     elif [ -f /etc/redhat-release ]; then
-        echo 'rhel'
+        _ONE_OS_ID='rhel'
 
     else
         _ONE_OS_ID=$(uname | tr '[:upper:]' '[:lower:]')